comparison of multistorey building with regular and
TRANSCRIPT
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
www.rsisinternational.org Page 1
Comparison of Multistorey Building with Regular
and Irregular Shape in Different Seismic Zones M. Seetha
1, K.E.Viswanathan
2
1PG scholar, Department of Civil Engineering, Builders College of Engineering, Kangayam-638 108, Tirupur Dt. TamilNadu,
India 2Assistant Professor, Department of Civil Engineering, Builders College of Engineering, Kangayam-638 108, Tirupur Dt.
TamilNadu, India
Abstract: -Most of the Indian lands square measure insecure
owing to the vibrations caused by the earthquakes. Also, it's not
possible to stop, however the damages to the buildings may be
controlled by means that of effective seismic styles. during this
study chiefly focuses on deciding the variation in reinforcement
share for various seismic zones of Republic of India. during this
gravity hundreds as per IS 456 : 2000 and once the building is
intended for earthquake forces in numerous zones as per IS 1893
(Part 1) : 2002 at the side of wind hundreds as per IS 875 (Part 3)
: 1987 square measure to be thought-about. For this study each
regular and irregular geometric building plans square measure
to be thought-about with an equivalent space of 5192sq.ft having
G+5 storeys square measure analyzed and designed by
exploitation structural analysis computer code tool ETABS-2015.
This study conjointly includes the determination of displacement,
moment, shear and base shear. the value comparison analysis
conjointly to be enclosed, as a result of supported the zone
alternatives it's varied. Then the results square measure
compared with wind hundreds, gravity hundreds in varied
seismic zones
Key Words: AUTO CAD, ETABS, Reinforcement, Displacement,
Moment, Shear, Base Shear. Regular building, Irregular
building
I. INTRODUCTION
n earthquake may be a phenomenon that ends up in the
immense devastation of built systems and facilities.
within the gift state of affairs earthquake engineering attracts
major attention of human as a result of this can be the event
that can not be accurately foreseen it's the abrupt event that
happens because of numerous reasons comparable to
A. Movement of tectonic plates.
B. Abrupt slips at the faults.
C. Volcanic earthquakes.
D. Because of explosive.
E. Because of mining etc.
Many reaches are conducted on this subject and still it's
continued, as a result of a lot of we have a tendency to attempt
to learn a lot of we are able to minimize the damages and save
the lives. in line with studies are created on the geophysics
concerning ninetieth earthquake happens because of tectonics.
If we have a tendency to return to engineering Associate in
Nursing engineer’s job is to supply most safety within the
structures designed and maintain the economy. Whenever a
structure styleed is meant is intended for natural incident
comparable to earthquake we have a tendency to design it to
behave the subsequent limit states.
1.1. Serviceability
In this case structure can suffer less or no structural injury.
Buildings that ar necessary in their nature comparable to
hospital, assembly halls, and nuclear plants ar designed
underneath this class as a result of even once earthquake it
ought to be serviceable.
1.2. Damageability
In this kind, if Associate in Nursing earthquake happens some
broken can happen and it will repaired and place to re-use.
Permanents building fall in these classes.
1.3. Collapse
In this case building is unengaged to broken however the
supports are remains safe in-tuned the permanents masses. In
earthquake analysis the force that really acts on the structure
at the time of earthquake ar abundant over the forces that ar
designed. The lateral forces applied throughout unstable
analysis ar extremely unpredictable. Thus, the look criteria
ought to give minimum necessities to take care of safety
against earthquake and major fails and loss of lives. The
collapse of structure will be minimize if following points
taken into thought.
The pattern of failure will be created ductile rather
than brittle, if malleability is assured dissipation of
energy made can show bit of decay.
Failure of flexure ought to precede shear failure.
The columns shouldn't fail before beams.
The joints ought to be onerous compare to members
which can meet into them.
II. LITERATURE REVIEW
Anshuman Nimade, Niraj Soni, Mahesh Patidar and
Vikas Joshi (2018), the target of study is to review the
structural behaviour of shear wall – flat block interaction with
A
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
www.rsisinternational.org Page 2
gap. In G+9 storeys, 2 differing types of mixtures area unit
thought-about for the analysis. Like (i) flat block with 2
hundredth shear wall gap. (ii) flat block while not shear wall
gap. the whole analysis was done by exploitation STAAD-Pro
code with dynamic loading condition. In irregular structures
response spectrum methodology is additional appropriate for
the analysis. wholly fifteen models area unit created with the
concerns of third, 2 hundredth and three hundredth vertical
irregularities. They conclude that the flat block Structure with
shear wall on central fringe is appropriate for the result of
dynamic load on the performance of building & negligible
effects of gap of size 2 hundredth of the shear wall on the
stiffness of the system. and also the comparison is created
between Stresses & Bending Moment on flat block, node
displacement, Base shear, Story drift & the result area unit
brought out.
Akhil R, Aswathy S Kumar (2017), this study comprises the
modeling of standard and H-shape set up irregular building
having G+10 storeys. The attainment of this framed building
within the time of study earthquake motions depends on the
distribution of stiffness, strength, and mass in each the
horizontal and vertical planes of the building. the most aim of
this work is comparative study of the stiffness of the structure
by considering the 3 models in Regular Structure and 3
models in set up irregular structure with completely different
Vertical irregular structure. Response spectrum methodology
was adopted for the analysis of vertically irregular RC
buildings. All models area unit analyzed with dynamic
earthquake loading for the Zones V. Result found from the
response spectroscopic analysis that in irregular formed
building displacements area unit quite that of standard formed
building. All building frames area unit sculpturesque in code
STAAD.Pro V8i. numerous unstable responses like base
shear, frequency, node displacement, etc area unit obtained.
They concludes that the comparison of each geometric
buildings the utmost quantity of displacement and base shear
was occurred in regular building solely. particularly regular
with U formed vertical irregular building having the utmost
displacement compared to different shapes. And period of
time is most for H-shaped set up configuration and also the
Average Frequency was most for Irregular Building.
Preeti Singh (2017), this work consist each regular and
irregular geometric shapes. every shapes with G+10 storied
model was created by exploitation STAAD-Pro code with
earthquake and wind load conditions. In regular form building
static analysis was dole out within the unstable zones II and
III. particularly in irregular form building T form was
choosened and also the dynamic analysis was in dire straits
the unstable zones IV and V. Finally calculated base shear,
volume of concrete, weight of steel and also the value
comparison analysis area unit compared for all unstable zones.
Inchara K P, Ashwini G (2016), the most objectives of this
study were to review the performance and variation in steel
proportion and quantities concrete in RC framed irregular
building in gravity load and completely different unstable
zones. And to grasp the comparison of steel reinforcement
proportion and quantities of concrete once the building is
meant as per IS 456 : 2000 for gravity masses and once the
building is meant as per IS 1893 (Part 1) : 2002 for earthquake
forces in numerous unstable zones. during this study 5 (G+4)
models were thought-about for the analysis. All the four
models were sculpturesque and analyzed for gravity masses
and earthquake forces in numerous unstable zones. ETABS
code was used with ESLM and RSM were adopted for the
analysis of the models. in line with their analysis, it will be
inferred that support reactions attended increase because the
zone varied from II to V, that successively raised volume of
concrete and weight of steel reinforcement in footings and just
in case of beams, proportion of steel reinforcement raised
through zones II to V.
Ravi Kiran, Sridhar R (2016), the most objective of this
project is that the comparative study of standard and vertically
irregular building having twenty storeys with RC framed
structure having three differing types of sculpturesque
structures area unit below earthquake forces. The structure is
analyzed and designed by exploitation SAP 2000 code. The
Comparison is completed on the idea of shear force, bending
moment, level drifts and node displacement. The reduction in
drift, deflection and elementary period of time of the regular
and irregular building area unit to be supported with
equivalent static and dynamic (Response Spectrum) loading
cases for the zones II to V. he conclude that, among the 3
structures thought-about (Regular, set up irregularity and
vertical irregularity), Regular structure shown most
displacement and drift for all the zones in each static and
dynamic analysis.
Abdul Khadeer Quraishi, Arshad Syed Masood Ahmed,
and Md Zubair Ahmed (2015), the study was conducted on
RC framed structure having G+10 storeys with unsymmetrical
form. the whole model was analyzed and designed by
exploitation STAAD-Pro code. to check proportion of steel
quantities for buildings subjected to gravity masses, seismal
forces in conjunction with wind load. once analysis and style
they have to be compelled to the conclusion that proportion of
reinforcement in column with most load is one.985% to
45.438%, just in case of beams it had been thirty five.112% to
95.867% for basement floors. because the concrete grade
raised reinforcement space cut. Steel proportion is a lot of in
exterior and edge columns whereas it's less in interior
columns and just in case of beam external beam needs less
proportion of reinforcement compared to internal beams.
III. OBJECTIVE AND SCOPE OF THE STUDY
The objective of the current work is to review the distinction
between regular and irregular formed buildings with gravity
load, wind load and seismic masses. Each sort of building
having G+5 storeys with same builtup areas. The planning of
wind load was calculated supported IS 875 (Part 3) : 1987 and
also the earthquake load was calculated supported IS 1893
(Part 1) : 2002. The current study primarily focuses on
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
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comparison of share of steel from zone to zone with the
hundreds of wind, gravity and earthquake forces area unit to
be thought-about and also the moment, shear, displacement,
base shear and value comparisons area unit to be obtained.
The ETABS computer code program is employed to perform
the analysis and style.
IV. METHODOLOGY
The methodology of this study is scheming the unstable
effects caused by AN earthquake in regular and irregular form
buildings having constant buildup space. And additionally
compared with totally different unstable zones as per IS 1893
(Part 1) : 2002 codal provisions. The building model is made
and analyzed by ETABS package. The methodology
concerned during this study is given below
AUTO CAD : Arrange & layout preparation
ETABS : Model creation
Material specification
Generating load and cargo mixtures
Assigning of hundreds
Joint or support creation
Analysing of structures
Compared with totally different unstable zones
Result and discussion.
V. PLAN DETAILS
Building plans having a similar overall plot space of
5192sq.ft. However the builtup space of irregular building is
3818sq.ft. Every plots having the subsequent sq. feets.
Plot 1 = 29’ x 42’ = 1218sq.ft
Plot 3 & 4 = 29’ x 46’ = 1334sq.ft
Fig - 5.1: Regular building typical floor plan by using AutoCad
Fig - 5.2: Irregular building typical floor plan by using AutoCad
VI. BY ETBAS
6.1. Introduction to ETABS software
ETABS code is employed for the analysis of projected
structural models. The equivalent static methodology is
employed for analysis of symmetrical building dimensions.
And dynamic analysis is completed unstable forces that
square measure response spectrum methodology. it's a
complete finite component based mostly structural analysis
program with special purpose options for structural analysis
and style of building systems. Embedded at a lower place the
straightforward, intuitive programme square measure terribly
powerful numerical strategies, style procedures and
international style codes that permit you to be versatile and
productive, whether or not you're planning a straightforward
2-dimensional frame or playacting a dynamic base isolation
analysis of a fancy high-rise.
6.2. Fundamental Concept
ETABS code works off of associate degree integrated
information. the essential idea is that we tend to produce only
1 model consisting of the ground systems and therefore the
vertical and lateral framing systems to analysis and style the
entire building. Everything we want is integrated into one
versatile analysis and style system with one programme.
There are not any external modules to keep up and no worries
concerning knowledge transfer between modules. the
consequences on one a {part of} the structure from changes in
another part square measure fast and automatic.
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
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6.3. Variety of Options
The analysis ways embrace a large form of Static and
Dynamic Analysis choices. The integrated model will
embrace, among others, advanced Composite Floor Framing
Systems with Openings and Overhangs, Steel beam Systems,
Moment Resisting Frames, advanced Shear Wall Systems,
Rigid and versatile Floors, aslant Roofs, Ramps and Parking
Structures, Mezzanine Floors, bound Systems, Multiple
Tower Buildings and Stepped Diaphragm Systems
VII. ANALYSIS
7.1. Modelling data:
For Regular and Irregular Building
Beam size - 0.3x0.3m
Column size - 0.3x0.23m
Grade of concrete - M25
Grade of steel - Fe500
No of stories - G+5
Plinth level - 0.6m
Structure sort - RC framed structure
Thickness of block - 0.17m
Total floor height - 18.6m
Typical floor height - 3m
7.2. Material Properties
The following Table 7.1 explains the properties used in the
creation of models.
Table -7.1: Material Properties
Name Type E V Unit
Weight Design
Strengths
Units MPa kN/m3 MPa
HYSD
500 Rebar 199947.96 0.3 76.9729
Fy=413.69
Fu=620.53
HYSD
500 Rebar 199947.96 0 76.9729
Fy=413.69
Fu=620.53
M25 concrete 24855.58 0.2 23.5631 Fc= 27.58
7.3. Load Combinations
The following load combinations are used for the analysis
purpose.
1.2 (DL+LL) 1.5 (DL+EL) 1.2 (DL+LL+EL)
1.2 (DL+LL-EL) 1.5 (DL-EL) 0.9 (DL) + 1.5 (LL)
1.2 (DL+LL-WL) 1.5 (DL+WL)
7.4. Model Creation and its results
The following models area unit created by exploitation
ETABS-2015 code. The higher than mentioned details area
unit applied for the creation of models for each regular and
irregular structures.
Fig - 7.1: Regular building plan view of ETABS software
Fig - 7.2: Regular building elevation view of ETABS software
Fig - 7.3: Regular building 3D view of ETABS software
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
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Fig - 7.4: Irregular building plan view of ETABS software
Fig - 7.5: Irregular building elevation view of ETABS software
Fig - 7.6: Irregular building 3D view of ETABS software
7.4.1. Applied forces
Fig - 7.7: Applied storey forces for regular building
Fig - 7.8: Applied storey forces for irregular building
7.4.2. Deformation shapes
Fig - 7.9: Deformed shape for regular building in elevation view
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
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Fig - 7.10: Deformed shape for irregular building in 3d view
7.4.3. Concrete frame moment and shear
Fig - 7.11: Concrete frame moment for regular building
Fig - 7.12: Concrete frame shear for regular building
7.4.4. Display shell stress
Fig -7.13: Shell stress in plan view for regular building
Fig - 7.14: Shell stress in 3D view irregular building
7.4.5. Design frame loads
Fig - 7.15: Display frame load for regular building
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume III, Issue VI, June 2018|ISSN 2454-6194
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Fig - 7.16: Design frame loads for Irregular building
VIII. CONCLUSION
In this study regular and irregular geometric building plans
and layouts area unit done by exploitation AutoCAD code.
and also the modeling of each structures area unit created by
exploitation ETABS code. and also the loadings like gravity
hundreds as per IS 456 : 2000 and once the building is
intended for earthquake forces in numerous zones as per IS
1893 (Part 1) : 2002 together with wind hundreds as per IS
875 (Part 3) : 1987 area unit to be taken into concerns for the
planning purpose. In future analysis of each structures,
planning and price comparisons area unit to be completed by
exploitation ETABS code -2015.
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